What composer worked in the first ten years of the twentieth century?

One composer who worked in the first ten years of the twentieth century is Claude Debussy. He was a French composer known for his impressionistic style, blending elements of Western Classical Music with non-Western scales and modes. His works, such as "Clair de Lune" and "Prelude to the Afternoon of a Faun," are considered groundbreaking in music history.